Merge branch 'MDL-48468' of https://github.com/mr-russ/moodle

cache/stores/redis/README.md

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+Redis Cache Store for Moodle
+============================
+
+A Moodle cache store plugin for [Redis](http://redis.io).
+
+This plugin requires the [PhpRedis](https://github.com/nicolasff/phpredis) extension.  The PhpRedis extension can be installed via PECL with `pecl install redis`.

cache/stores/redis/addinstanceform.php

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+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Redis Cache Store - Add instance form
+ *
+ * @package   cachestore_redis
+ * @copyright 2013 Adam Durana
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+require_once($CFG->dirroot.'/cache/forms.php');
+
+/**
+ * Form for adding instance of Redis Cache Store.
+ *
+ * @copyright   2013 Adam Durana
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class cachestore_redis_addinstance_form extends cachestore_addinstance_form {
+    /**
+     * Builds the form for creating an instance.
+     */
+    protected function configuration_definition() {
+        $form = $this->_form;
+
+        $form->addElement('text', 'server', get_string('server', 'cachestore_redis'), array('size' => 24));
+        $form->setType('server', PARAM_TEXT);
+        $form->addHelpButton('server', 'server', 'cachestore_redis');
+        $form->addRule('server', get_string('required'), 'required');
+
+        $form->addElement('text', 'prefix', get_string('prefix', 'cachestore_redis'), array('size' => 16));
+        $form->setType('prefix', PARAM_TEXT); // We set to text but we have a rule to limit to alphanumext.
+        $form->addHelpButton('prefix', 'prefix', 'cachestore_redis');
+        $form->addRule('prefix', get_string('prefixinvalid', 'cachestore_redis'), 'regex', '#^[a-zA-Z0-9\-_]+$#');
+    }
+}

cache/stores/redis/lang/en/cachestore_redis.php

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+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Redis Cache Store - English language strings
+ *
+ * @package   cachestore_redis
+ * @copyright 2013 Adam Durana
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+$string['pluginname'] = 'Redis';
+$string['prefix'] = 'Key prefix';
+$string['prefix_help'] = 'This prefix is used for all key names on the Redis server.
+* If you only have one Moodle instance using this server, you can leave this value default.
+* Due to key length restrictions, a maximum of 5 characters is permitted.';
+$string['prefixinvalid'] = 'Invalid prefix. You can only use a-z A-Z 0-9-_.';
+$string['test_server'] = 'Test Server';
+$string['test_server_desc'] = 'Redis server to use for testing.';
+$string['server'] = 'Server';
+$string['server_help'] = 'This sets the hostname or IP address of the Redis server to use.';